A Dog Walker's Dream Come True! With only one lead leash, walk two or three dogs at the same time. Have more dogs to walk? Pair different sizes together for the ultimate in Dog Walking Experience. 4" coupler is designed for small breeds 12" coupler is for medium to large breeds 24" coupler is ideal for the largest breeds Made of high-quality, durable nylon webbing with heavy duty swivel snaps in Bold, Classic Black. Each length is available in 2 way or 3 way configurations. Choose your sizes!